#!/usr/local/bin/perl -w

use strict;

use Benchmark;

my $foo = 0;
# $foo will be toggled between true and false

my $x;

timethese(-10,
          {
           mod   => sub { $x = 1 if $foo ^= 1 },
           block => sub { if ($foo ^= 1) { $x = 1 } },
           and   => sub { $foo ^= 1 and $x = 1 },
          }
         );
__END__

Benchmark: running and, block, mod, each for at least 10 CPU seconds...
       and: 233020.67/s
     block: 230307.69/s
       mod: 234463.20/s
Benchmark: running and, block, mod, each for at least 10 CPU seconds...
       and: 237002.40/s
     block: 236647.46/s
       mod: 226841.12/s